What was found in Spring's water
The level at the city's main supplier, the highest level anywhere in the city, the EPA limit for each, and where every figure comes from.
| Contaminant | Level vs EPA limit | Suppliers | Source |
|---|---|---|---|
| Fluoride | 119.5 µg/L 3% of the EPA limit 4000 µg/L Main supplier: HARRIS COUNTY MUD 43 · 5,940 people · 2017
Highest in the city: 1047.9999999999998 µg/L — HARRIS COUNTY MUD 23 · 3,170 people · 2017 | 10/12 | SYR4 |
| Nitrate-Nitrite | 289 µg/L 2.9% of the EPA limit 10000 µg/L Main supplier: HARRIS COUNTY MUD 43 · 5,940 people · 2015
Highest in the city: 1014.4999999999998 µg/L — HARRIS COUNTY MUD 23 · 3,170 people · 2019 | 8/12 | SYR4 |
| Nitrite | 840.4999999999999 µg/L 84% of the EPA limit 1000 µg/L Highest in the city: HARRIS COUNTY MUD 23 · 3,170 people · 2019 | 2/12 | SYR4 |
| Nitrate | 290 µg/L 2.9% of the EPA limit 10000 µg/L Main supplier: HARRIS COUNTY MUD 43 · 5,940 people · 2019
Highest in the city: 640 µg/L — HARRIS COUNTY MUD 191 · 3,729 people · 2019 | 8/12 | SYR4 |
| Copper | 177.99999999999997 µg/L 14% of the EPA limit 1300 µg/L Main supplier: HARRIS COUNTY MUD 43 · 5,940 people · 2017
Highest in the city: 489.85000000000014 µg/L — HARRIS COUNTY MUD 316 · 1,083 people · 2018 | 12/12 | SYR4 |
| Barium | 245.8 µg/L 12% of the EPA limit 2000 µg/L Main supplier: HARRIS COUNTY MUD 43 · 5,940 people · 2019
Highest in the city: 423.5 µg/L — COTTAGE GARDENS · 1,047 people · 2018 | 11/12 | SYR4 |
| Cyanide | 129.5 µg/L 65% of the EPA limit 200 µg/L Highest in the city: HARRIS COUNTY MUD 23 · 3,170 people · 2017 | 1/12 | SYR4 |
| TTHM | 49.779999999999944 µg/L 62% of the EPA limit 80 µg/L Highest in the city: HARRIS COUNTY MUD 23 · 3,170 people · 2019 | 6/12 | SYR4 |
| Total Haloacetic Acids (HAA5) | 41.724999999999994 µg/L 70% of the EPA limit 60 µg/L Highest in the city: HARRIS COUNTY MUD 191 · 3,729 people · 2019 | 4/12 | SYR4 |
| Lead | 6.200000000000001 µg/L 41% of the EPA limit 15 µg/L Main supplier: HARRIS COUNTY MUD 43 · 5,940 people · 2017
Highest in the city: 39.83 µg/L — TIMBERCREST VILLAGE · 2,337 people · 2017 | 11/12 | SYR4 |
| Dichloroacetic Acid | 29.45 µg/L No EPA limit set Highest in the city: HARRIS COUNTY MUD 191 · 3,729 people · 2019 | 4/12 | SYR4 |
| Lithium | 11.3 µg/L No EPA limit set Main supplier: HARRIS COUNTY MUD 43 · 5,940 people · 2023
Highest in the city: 24 µg/L — HARRIS COUNTY MUD 23 · 3,170 people · 2024 | 2/12 | UCMR-5 |
| Chloroform | 23.1 µg/L No EPA limit set Highest in the city: HARRIS COUNTY MUD 191 · 3,729 people · 2019 | 6/12 | SYR4 |
| Gross Alpha, Excl. Radon And U | 3.5 pCi/L 23% of the EPA limit 15 pCi/L Main supplier: HARRIS COUNTY MUD 43 · 5,940 people · 2019
Highest in the city: 18.924999999999997 pCi/L — HARRIS COUNTY MUD 23 · 3,170 people · 2019 | 6/12 | SYR4 |
| Dibromochloromethane | 16.019999999999992 µg/L No EPA limit set Highest in the city: HARRIS COUNTY MUD 23 · 3,170 people · 2019 | 6/12 | SYR4 |
| Combined Uranium | 15.41 µg/L 51% of the EPA limit 30 µg/L Highest in the city: NORTH POINT VILLA · 144 people · 2018 | 4/12 | SYR4 |
| Bromodichloromethane | 14.225000000000001 µg/L No EPA limit set Highest in the city: HARRIS COUNTY MUD 23 · 3,170 people · 2019 | 5/12 | SYR4 |
| Gross Beta Particle Activity | 11.4 pCi/L No EPA limit set Highest in the city: PINEWOOD PLACE MOBILE HOME COMMUNITY · 1,050 people · 2015 | 5/12 | SYR4 |
| Bromoform | 9.439999999999998 µg/L No EPA limit set Highest in the city: HARRIS COUNTY MUD 23 · 3,170 people · 2019 | 3/12 | SYR4 |
| Trichloroacetic Acid | 9.075000000000001 µg/L No EPA limit set Highest in the city: HARRIS COUNTY MUD 191 · 3,729 people · 2019 | 4/12 | SYR4 |
| Monochloroacetic Acid | 8.029999999999998 µg/L No EPA limit set Highest in the city: HARRIS COUNTY MUD 23 · 3,170 people · 2019 | 3/12 | SYR4 |
| Dibromoacetic Acid | 6.979999999999993 µg/L No EPA limit set Highest in the city: HARRIS COUNTY MUD 23 · 3,170 people · 2019 | 2/12 | SYR4 |
| Selenium | 5.9799999999999995 µg/L 12% of the EPA limit 50 µg/L Highest in the city: HARRIS COUNTY MUD 23 · 3,170 people · 2017 | 2/12 | SYR4 |
| Combined Radium (-226 And -228) | 2.5 pCi/L 50% of the EPA limit 5 pCi/L Main supplier: HARRIS COUNTY MUD 43 · 5,940 people · 2013
Highest in the city: 5.3599999999999985 pCi/L — HARRIS COUNTY MUD 23 · 3,170 people · 2019 | 7/12 | SYR4 |
| Arsenic | 4.4 µg/L 44% of the EPA limit 10 µg/L Highest in the city: HARRIS COUNTY MUD 23 · 3,170 people · 2017 | 6/12 | SYR4 |
| Di(2-ethylhexyl) Phthalate | 1.4 µg/L 23% of the EPA limit 6 µg/L Highest in the city: HARRIS COUNTY MUD 23 · 3,170 people · 2019 | 1/12 | SYR4 |
| Atrazine | 0.3500 µg/L 12% of the EPA limit 3 µg/L Highest in the city: HARRIS COUNTY MUD 191 · 3,729 people · 2018 | 2/12 | SYR4 |
| Simazine | 0.2410 µg/L 6% of the EPA limit 4 µg/L Highest in the city: HARRIS COUNTY MUD 23 · 3,170 people · 2019 | 1/12 | SYR4 |
| Pfba | 0.0073 µg/L No EPA limit set Highest in the city: HARRIS COUNTY MUD 23 · 3,170 people · 2025 | 1/12 | UCMR-5 |
| Pfpea | 0.0052 µg/L No EPA limit set Highest in the city: HARRIS COUNTY MUD 23 · 3,170 people · 2025 | 1/12 | UCMR-5 |
| Pfhxa | 0.0045 µg/L No EPA limit set Highest in the city: HARRIS COUNTY MUD 23 · 3,170 people · 2025 | 1/12 | UCMR-5 |
| Lead | 0.0021 mg/L 14% of the EPA limit 0.0150 mg/L Main supplier: HARRIS COUNTY MUD 43 · 5,940 people · 2023 | 11/12 | LCR |
Each bar shows the measured level as a share of the EPA limit: green is
well under, amber is close to it, red is over. For lead and copper the
limit applies to exactly the 90th-percentile figure shown, so red there
means a real exceedance. For everything else the limit applies to a
running annual average while the figure is the 95th percentile of the
system's samples — over 100% is worth reading, but is not by itself a
violation.
Formal violations are listed separately.
These are the utilities' own EPA-reported results, not a city-wide
average. A detection means the lab measured the
substance — it isn't the same as exceeding a legal limit. Hover a source
tag to see the EPA program and years behind each figure.
Water suppliers serving Spring
| Supplier | Population served |
|---|---|
| HARRIS COUNTY MUD 43 | 5,940 |
| HARRIS COUNTY MUD 191 | 3,729 |
| HARRIS COUNTY MUD 23 | 3,170 |
| TIMBERCREST VILLAGE | 2,337 |
| HARRIS COUNTY MUD 316 | 1,083 |
| PINEWOOD PLACE MOBILE HOME COMMUNITY | 1,050 |
| COTTAGE GARDENS | 1,047 |
| ATASCOCITA VILLAGE MOBILE HOME PARK | 723 |
| NORTH POINT VILLA | 144 |
| WHEAT MEADOW MOBILE HOME PARK SECTION I | 48 |
| WHEAT MEADOW MOBILE HOME PARK SECTION II | 48 |
| HOOKS AIRPORT SOUTH END | 25 |
Frequently asked questions about Spring tap water
Is Spring tap water safe to drink?
EPA testing detected 32 contaminants in the water serving Spring. A detection isn't the same as a violation — most detected levels are within federal limits. Check the level and source for each contaminant above, and your utility's annual Consumer Confidence Report for the official compliance status.
How many water suppliers serve Spring?
12 public water suppliers report drinking-water monitoring for Spring, Texas to the EPA. Each is listed above with its population served.
What contaminants are in Spring's water?
The contaminants EPA monitoring detected in Spring include Fluoride, Nitrate-Nitrite, Nitrite, Nitrate, Copper. The full list, with the level at the main supplier and the data source, is in the table above.
Where does this data come from?
Every figure is official EPA drinking-water monitoring — the Lead & Copper Rule, the UCMR-5 nationwide testing program, and the EPA Six-Year Review — not our own testing. Each number is labelled with its source and period.